Stock-Based Incentive Plans Nonvested Restriced Stock (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award | |||
| Nonvested at December 31, 2015 | 829,000 | ||
| Granted | 138,000 | ||
| Vested | (342,000) | ||
| Canceled | (292,000) | ||
| Nonvested at December 31, 2016 | 333,000 | 829,000 | |
| Nonvested, weighted average grant date fair value at December 31, 2015 | $ 14.41 | ||
| Granted, weighted average grant date fair value | 3.12 | ||
| Vested, weighted average grant date fair value | 15.33 | ||
| Canceled, weighted average grant date fair value | 14.28 | ||
| Nonvested, weighted average grant date fair value at December 31, 2016 | $ 8.90 | $ 14.41 | |
| Restricted Stock [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award | |||
| Granted, weighted average grant date fair value | $ 12.83 | $ 14.41 | |